As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
AFTER STARTUP AND BEFORE TAXI, COCKPIT AND CABIN BEGAN TO FILL WITH OILY SMOKE. INSPECTED A/C SYS AND DETERMINED AFT ACM WAS FAULTY. R & R AFT ACM, SERVICED UNIT AND OPS CHECKED SATISFACTORY. OPS AND LEAK CHECKED SATISFACTORY. ALL WORK IAW MM 21-51-00.